Control of a doubly-fed induction generator via a direct two- stage power converter

Reyes, E.; Peña, Ricardo Ramiro; Cárdenas, Roberto; Clare, John; Wheeler, Patrick

doi:10.1049/cp:20080527

Cited by 8 publications

(5 citation statements)

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“…The "virtual dc link" voltage in one modulation period is also given by (8). The corresponding line voltages are shown in Table VI.…”

Section: B Modulation Strategy For Reduced DC Voltagementioning

confidence: 99%

“…These topologies offer an "all silicon solution" for ac-ac conversion, achieving sinusoidal input and output waveforms along with bidirectional power flow, without using the bulky capacitors which are required in the dc link of rectifier-inverterbased converters. The application of an IMC to control the rotor currents of a doubly fed induction generator (DFIG) in a variable speed generation system was reported in [8] and [9]. The IMC has a similar performance to the standard MC in terms of low distortion in the input currents, bidirectional power flow, and the number of devices.…”

Section: Introductionmentioning

confidence: 99%

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Control of a Doubly Fed Induction Generator via an Indirect Matrix Converter With Changing DC Voltage

Peña

Cárdenas

Reyes

et al. 2011

IEEE Trans. Ind. Electron.

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This paper presents a control strategy for a doubly fed induction generator (DFIG) using an indirect matrix converter, which consists of an input side matrix converter and an output side voltage source converter (VSC). The capability of the input converter to generate different "virtual dc link" voltage levels is exploited. The commutation of the VSI with reduced voltage is illustrated for operating points where the output voltage demand is low without any deterioration of the current control performance. The proposed method leads to a reduction in the commutation losses in the output converter and reduced commonmode voltage. For the input converter, soft switching commutation is obtained by synchronizing the input and output converter pulsewidth-modulation patterns. This modulation strategy is particularly applicable in DFIG applications because the required rotor voltage decreases when the DFIG speed is close to the synchronous speed. The complete control strategy is experimentally validated using a 2-kW rig.Index Terms-AC machines, machine vector control and space vector pulsewidth modulation (PWM), matrix converter (MC).

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“…The "virtual dc link" voltage in one modulation period is also given by (8). The corresponding line voltages are shown in Table VI.…”

Section: B Modulation Strategy For Reduced DC Voltagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Control of a Doubly Fed Induction Generator via an Indirect Matrix Converter With Changing DC Voltage

Peña

Cárdenas

Reyes

et al. 2011

IEEE Trans. Ind. Electron.

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“…Due to the above-mentioned features, matrix converter may become a good candidate for wind power applications. The utilizations of a matrix converter have been explored, respectively, with gear-drive DFIGs (Zhang et al, 1997;Cardenas et al, 2009b;Reyes et al, 2008;Pena et al, 2009) and SCIGs (Barakati et al, 2009;Cardenas et al, 2009b, c), and direct-drive PMSGs (Miliani et al, 2007).…”

Section: Matrix Convertersmentioning

confidence: 99%

Electrical machines and power‐electronic systems for high‐power wind energy generation applications

2012

COMPEL

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Purpose -Power-electronic systems have been playing a significant role in the integration of large-scale wind turbines into power systems due to the fact that during the past three decades power-electronic technology has experienced a dramatic evolution. This second part of the paper aims to focus on a comprehensive survey of power converters and their associated control systems for high-power wind energy generation applications. Design/methodology/approach -Advanced control strategies, i.e. field-oriented vector control and direct power control, are initially reviewed for wind-turbine driven doubly fed induction generator (DFIG) systems. Various topologies of power converters, comprising back-to-back (BTB) connected two-and multi-level voltage source converters (VSCs), BTB current source converters (CSCs) and matrix converters, are identified for high-power wind-turbine driven PMSG systems, with their respective features and challenges outlined. Finally, several control issues, viz., basic control targets, active damping control and sensorless control schemes, are elaborated for the machine-and grid-side converters of PMSG wind generation systems. Findings -For high-power PMSG-based wind turbines ranging from 3 MW to 5 MW, parallel-connected 2-level LV BTB VSCs are the most cost-effective converter topology with mature commercial products, particularly for dual 3-phase stator-winding PMSG generation systems. For higher-capacity wind-turbine driven PMSGs rated from 5 MW to 10 MW, medium voltage multi-level converters, such as 5-level regenerative CHB, 3-and 4-level FC BTB VSC, and 3-level BTB VSC, are preferred. Among them, 3-level BTB NPC topology is the favorite with well-proven technology and industrial applications, which can also be extensively applicable with open-end winding and dual stator-winding PMSGs so as to create even higher voltage/power wind generation systems. Sensorless control algorithms based on fundamental voltages/currents are suggested to be employed in the basic VC/DPC schemes for enhancing the robustness in the entire PMSG-based wind power generation system, due to that the problems related with electromagnetic interferences in the position signals and the failures in the mechanical encoders can be avoided. Originality/value -This second part of the paper for the first time systematically reviews the latest state of arts with regard to power converters and their associated advanced control strategies for high-power wind energy generation applications. It summarizes a variety of converter topologies with pros and cons highlighted for different power ratings of wind turbines.

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“…If voltage unbalance is not taken into account by the DFIG control system, the stator current could become highly unbalanced even with a small unbalanced stator voltage, which will create unequal heating in the stator windings and oscillations of torque and output active and reactive power. In this case, generation system under the unbalanced voltage would definitely decrease the efficiency of the whole system [3,4,5] . The input stage of the indirect matrix converter provides a positive DC voltage by switching the input line voltage.…”

Section: Introductionmentioning

confidence: 99%

PR Control for Two-Stage Matrix Converter Excitation Doubly Fed Wind Generation System under Unbalanced Grid Voltage Conditions

Wang

Zhong

Song

2012

2012 Asia-Pacific Power and Energy Engineering Conference

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This paper presents the analysis and operation of doubly fed induction generator (DFIG) excited by two-stage matrix converter under unbalanced network voltage conditions. Two-stage matrix converter has a real DC link, but does not contain large DC link energy storage capacitors compared with conventional PWM converters. Therefore, output current waveform will be directly affected when the grid side voltage is unbalanced. A new current control scheme, consisting of a proportional resonant (PR) controller, is presented which is implemented in the stationary αβ reference frame and capable of providing precise current control for two-stage matrix converter excitation doubly fed induction generator. Simulation studies are carried out on a DFIG generation system, and simulation results are provided to demonstrate the effectiveness of the proposed control strategy under unbalanced grid voltage conditions.

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Control of a doubly-fed induction generator via a direct two- stage power converter

Cited by 8 publications

References 0 publications

Control of a Doubly Fed Induction Generator via an Indirect Matrix Converter With Changing DC Voltage

Control of a Doubly Fed Induction Generator via an Indirect Matrix Converter With Changing DC Voltage

Electrical machines and power‐electronic systems for high‐power wind energy generation applications

PR Control for Two-Stage Matrix Converter Excitation Doubly Fed Wind Generation System under Unbalanced Grid Voltage Conditions

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